The last of the six periods of the Paleozoic era, it follows the Carboniferous period. 为古生代六个纪中最后的一个纪，在石炭纪之后。
Classification of chronostratigraphic and the biota from the end of Devonian period to Early Carboniferous epoch of Northern Guangxi 桂北泥盆纪末至早石炭世生物群及年代地层划分